quasar | 317b2e1eb9a1d427e165f38f2a44bd90329b729de3f7a2d19c511e023eab73a8 | Triage™

Analysis

max time kernel
135s
max time network
137s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
17/08/2024, 01:56

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General

Target
Client-built.exe
Size 3.1MB
Sample240817-cc49jstgln
SHA256 317b2e1eb9a1d427e165f38f2a44bd90329b729de3f7a2d19c511e023eab73a8
MD5 771320cba78821e9c290263827e4d32a
SHA1 9a39d6397eaf5e44a51d99a246a313decb113907
SHA512 d14b207cfacdbf3bc1b2516ed677e83ace171258995f4a85dc0f79aecd296126d76fa02c4c28fc9983bece819c528f0e6ac43225cb635c1df37070a3da8adec1
SSDEEP 49152:e+w9o5EqFBnmhVXIlQVL/I2jCQTHHB72eh2NTQ:e+vEqFBnmhVXIluD
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar skids spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SKIDS

C2

147.185.221.22:6712

Mutex

545a5892-0ce9-4925-83a7-479d8b964612

Attributes

encryption_key
9E968F05BD874BA1BE086FD1774A027473823F49
install_name
Windows Host Process.exe
log_directory
Windows-Logs
reconnect_delay
3000
startup_key
Windows Host Process
subdirectory
Windows

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 2 IoCs

resource	yara_rule
behavioral2/memory/164-1-0x0000000000390000-0x00000000006BC000-memory.dmp	family_quasar
behavioral2/files/0x000800000001abfe-8.dat	family_quasar

Executes dropped EXE 1 IoCs

pid	Process
1596	Windows Host Process.exe

Drops file in System32 directory 5 IoCs

description	ioc	Process
File opened for modification	C:\Windows\system32\Windows\Windows Host Process.exe	Windows Host Process.exe
File opened for modification	C:\Windows\system32\Windows	Windows Host Process.exe
File created	C:\Windows\system32\Windows\Windows Host Process.exe	Client-built.exe
File opened for modification	C:\Windows\system32\Windows\Windows Host Process.exe	Client-built.exe
File opened for modification	C:\Windows\system32\Windows	Client-built.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Modifies system certificate store 2 TTPs 2 IoCs

evasion spyware trojan

Install Root Certificate

Modify Registry

description	ioc	Process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349\Blob = 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	Windows Host Process.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\SystemCertificates\AuthRoot\Certificates\D1EB23A46D17D68FD92564C2F1F1601764D8E349	Windows Host Process.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
2472	schtasks.exe
4684	schtasks.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	164	Client-built.exe
Token: SeDebugPrivilege	1596	Windows Host Process.exe

Suspicious use of FindShellTrayWindow 6 IoCs

pid	Process
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe

Suspicious use of SendNotifyMessage 6 IoCs

pid	Process
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe
1596	Windows Host Process.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1596	Windows Host Process.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 164 wrote to memory of 2472	164	Client-built.exe	73
PID 164 wrote to memory of 2472	164	Client-built.exe	73
PID 164 wrote to memory of 1596	164	Client-built.exe	75
PID 164 wrote to memory of 1596	164	Client-built.exe	75
PID 1596 wrote to memory of 4684	1596	Windows Host Process.exe	76
PID 1596 wrote to memory of 4684	1596	Windows Host Process.exe	76

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:164
- C:\Windows\SYSTEM32\schtasks.exe
  "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2472
- C:\Windows\system32\Windows\Windows Host Process.exe
  "C:\Windows\system32\Windows\Windows Host Process.exe"
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Modifies system certificate store
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1596
- - C:\Windows\SYSTEM32\schtasks.exe
    "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:4684

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Scheduled Task

Persistence

Scheduled Task/Job

Scheduled Task

Privilege Escalation

Scheduled Task/Job

Scheduled Task

Defense Evasion

Modify Registry

Subvert Trust Controls

Install Root Certificate

Credential Access

Discovery

Query Registry

System Information Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

Windows Host Process.exe

Path C:\Windows\system32\Windows\Windows Host Process.exe
Size 3.1MB
SHA256 317b2e1eb9a1d427e165f38f2a44bd90329b729de3f7a2d19c511e023eab73a8
MD5 771320cba78821e9c290263827e4d32a
SHA1 9a39d6397eaf5e44a51d99a246a313decb113907
SHA512 d14b207cfacdbf3bc1b2516ed677e83ace171258995f4a85dc0f79aecd296126d76fa02c4c28fc9983bece819c528f0e6ac43225cb635c1df37070a3da8adec1
SSDEEP 49152:e+w9o5EqFBnmhVXIlQVL/I2jCQTHHB72eh2NTQ:e+vEqFBnmhVXIluD
MD5 SHA1 SHA512 SSDEEP

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memory/164-0-0x00007FF8B9813000-0x00007FF8B9814000-memory.dmp

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memory/164-1-0x0000000000390000-0x00000000006BC000-memory.dmp

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memory/164-2-0x00007FF8B9810000-0x00007FF8BA1FC000-memory.dmp

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memory/164-10-0x00007FF8B9810000-0x00007FF8BA1FC000-memory.dmp

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memory/1596-9-0x00007FF8B9810000-0x00007FF8BA1FC000-memory.dmp

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memory/1596-11-0x00007FF8B9810000-0x00007FF8BA1FC000-memory.dmp

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memory/1596-12-0x000000001CA40000-0x000000001CA90000-memory.dmp

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memory/1596-13-0x000000001CB50000-0x000000001CC02000-memory.dmp

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memory/1596-16-0x000000001CAC0000-0x000000001CAD2000-memory.dmp

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memory/1596-17-0x000000001D640000-0x000000001D67E000-memory.dmp

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memory/1596-18-0x00007FF8B9810000-0x00007FF8BA1FC000-memory.dmp

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